Sensor Input

Circuit Protection of Sensor Input



Design Notes:

Protection Application:
The sensor input provides an interface between the patient and the measurement circuits. The electrical threat will be ESD.
Solution Description:
As shown at the left, a single multilayer varistor is used to protect the sensor input.
Companion Solutions:
Higher-voltage ratings are available. For ultra-low leakage current requirements, the PulseGuard technology can be used.
Regulatory Issues:
The IEC 61000-4-2 will be the most appropriate standard that applies for this circuit. It supplies a test method for verifying that the end product is not susceptible to ESD events.
Unique Features:
Does not apply.
Application Warnings:
Does not apply.

Solutions

Solutions